The OD505 features a state-of-the-art dual capsule design. The active front capsule requires 48V phantom power and, at 4.4 mV / Pa, has almost the same sensitivity as a condenser microphone. The passive lower capsule is polarity-rotated, it senses and eliminates unwanted handling noise. The OD505 also includes another Austrian Audio proprietary development: The 3D Pop Noise Diffuser. This filter is specially designed for the OD505 and effectively reduces the impact of plosives.
By reducing the contact points of the capsule and the mounting, as well as eliminating unwanted reflections that can be caused by the housing, the Open Acoustics design results in a pristine, natural and resonance-free sound without any colouring.